50s

This doctor is, I believe, an American missionary , Ned Moser, who worked in Worawora, in the Volta Region, in the late 1950's and early 1960's.

History notes Between the wars rail travel and hotel accommodation were too expensive for the average Australian family. Motoring made holidays possible for a much larger percentage of the population. The 'motor gypsies', as they were called, cooked on the roadside and camped in tents. The first camping ground for traveling motorists was established at Woodend in Victoria in 1924. Permanent sleeping cabins soon began to appear on the camping grounds, to be followed by motels ("motor hotels"), caravan parks, and roadside eateries. Homemade caravans, which first appeared in the 1920s, made it possible to have touring holidays that were cheaper than staying at motels and more comfortable than in tents. With the upgrading of roads, local councils built caravan parks at beach resorts and tourist towns. The caravan industry really took off after the Don firm in Victoria began making caravans as a backyard business in 1934. By the early 1950s, many other caravan companies emerged including Viscount and Millard in New South Wales, Coronet and Franklin in Victoria, Chesney in Queensland, and Tru-Line in Western Australia. The competition was keen and the original plywood vans soon disappeared as sleek aluminum-clad models took over. Interiors became more sophisticated, with iceboxes and two-burner Shellite or kerosene stoves giving way to gas and electric refrigerators and ovens. Electric lighting quickly became standard and the caravans got larger. Local commercial production peaked in the mid-1970s. Compact caravans developed from the late 1970s with companies such as Windsor introducing the 'pop-top' to capitalize on interior space. Caravanning went through a decline for some years after that but in recent times has gained in popularity, with large numbers of 'grey nomads' (retired baby boomers) now leisurely touring the country." Source: vintagecaravans.proboards.com/thread/1991/caravan-history...

this picture makes me laugh! looks like a bunch of frustrated mothers! lmao!

HOw long did it take to fill it up after it got built ?